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Android Build a Simple Android App (retired 2014) Interrogating the App Toast Notifications

Posted by Andreas Protopapas
Andreas Protopapas
700 Points

Inheritance Issues

For the following code I don't quite understand why the commented out code does not work. I mean since allDoneToast is an instance of a Toast; why doesn't makeText() also executes on allDoneToast, and I ned to execute it in Toast and then transfer it along to allDoneToast?

I'm I thinking about it in the right way? or i'm I miles off? :P

/// //Toast allDoneToast.makeText( this, "All Done!",Toast.LENGTH_LONG );

Toast allDoneToast = Toast.makeText( this, "All Done!",Toast.LENGTH_LONG );

1 Answer

dan schmidt
dan schmidt
2,576 Points
dan schmidt
dan schmidt
2,576 Points

My java is even rustier than my ruby, but I thought you would have to instantiate a new instance of Toast to be able to call it's instance methods? Something like:

Toast allDoneToast = new Toast();

allDoneToast.makeText(this, "All Done!", Toast.LENGTH_LONG);

Of course, I have no idea what your constructors look like so how you instatiate Toast objects is probably different than above.

Edit;

Thinking about it some more, is makeText a constructor that you want the subclass allDoneToast to invoke from it's superclass Toast? If that is the case, I'm pretty sure you have to call super from the subclass. See here: http://docs.oracle.com/javase/tutorial/java/IandI/subclasses.html